Improvement in the manufacture of artificial stone



106. COMPOSITIONS,

COATING on PLASTIC UNITED STATES DANIEL M. SPROGLE,

IMPROVEMENT IN THE MANUFACTURE OF ARTIFICIAL STONE.

) EXAMINER PATENT OFFICE.

or ANNAPoLIs, MARYLAND, AND JAMES D. PIERCE,

OF MILWAUKEE, wisooNsiN.

Specification forming part of Letters Patent No. 130,963, dated August 27, 1872.

To all whom it may concern.-

Be it known that we, DANIEL M. SPROGLE, of Annapolis, Anne Arundel county and State of Maryland, and Laws D. PIERCE, of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented an Improvement in the Manufacture of Artificial Stone; and we do hereby declare that the following is a full, clear, and exact description thereof. I

This invention consists in the use of water, w 1 1 ich is highly charged with carbonic-acid gas for swig "om ounuseuntaihrnguma whereby the induration of such compounds is greatly facilitated.

The following description of my invention will enable others skilled in the art to understand it.

I make a concrete, which is omposed of ness previous to mixing it with the other substances. These substances are mixed together, in suitable proportions, with water which is impregnated with carbonic-acid gas WHICH.

rapidly carbonates the lime or cementin substances a'fi i a' r o otiiffif "'ilV'Eliave produced an excellent artificial stone in the manner above described in a few days without subjecting it to the action of carbonic-acid as in a kiln although, if desired, Ere-ma to the action of this, gas in addition to the carbonated water used in mixing the materials;

We prefer to employ sla as one of the elements of the compoun as 1 gives very good results. We do not, however, confine ourselves to the use of this substance, as it be ogiggg Nor do we confine ourselves proportions in combining the substances, as these may vary indefinitely.

Having described our invention, we claim- The use of carbonated water for mixing substances containing lime in the manufacture of artificial stone.

DANIEL M. SPBOGLE. JAMES D. PIERCE. Witnesses:

W. R. OEIssEY,

W. ST. JOHN SHERWOOD. 

